The chip_partner cable has TX/RX lights and the existing connector can be made into a 6 Pin with some glue and heat shrink. The cable costs about $10 shipped and takes about 2 weeks to arrive from China.
https://www.ebay.com/itm/123382330956

Robman: Thank you very much for all the help. I will try to do the upgrade on my comcast remote for fun! Sorry I didnt realize it was your upgrade I was talking about for the DV75

mdavej: awesome, thanks for the link. I ordered the chip_partner one from ebay I will do some searching and see if I can figure out the configuration of the pins and how to make it into the 6pin connector. But, if you have a link for a better description on how to do so I would really appreciate it. Ill check back later.

Hey Dave, I decided to buy one of these cables too, just so once I figured it out I could help others, and it just arrived today.

First, I tried using the color pinouts from one of Tommy's docs, but that didn't work, then I followed your link and used the pinout from Revwillie's post and that didn't work, so I tried the one from nejpski's post and that didn't work either. In RMIR I always started with auto detect, then I tried each of the other options. In most cases, it says downloading and the lights flash on the interface, but I always got the "no remotes found" popup.

Rob,
Do you really mean URC-8810N? Or URC-8820N? There is a URC-8810 sold in Europe by OFA, but I don't think we know anything about it. Regarding the URC-8820N, I suppose that someone has tried the chip-partner cable with JP1.2 remotes, but I don't know that for sure.

I knew I would get the model number wrong, that's how rusty I am with this stuff, and when I went to check the model number on the battery cover, I found that the cover came from a URC_6131N ! So yeah, the one that's basically the same shape as that, is that the 8820N ?

The flashes looked normal, and RMIR said it was downloading, but then it stopped and said no remotes.

And I was just attaching the wires to the pins individually, using the single connectors that it comes with. My intention was to throw a regular IDC connector on there, as I still have loads of them, but obviously I need the right pinout first.

And I am assuming that pin1 is still the one with the "cutout" in the border around the 6-pin, so top right corner as you look at it in the 8820._________________Rob
www.hifi-remote.comPlease don't PM me with remote questions, post them in the forums so all the experts can help!

Maybe Vicky can help with the pinout for a 8820. I'll check tonight on some JP1.3 remotes.

I dont have a clue as to what a pinout is, lol. The notch in the outline is still pin 1. There are two 8820n jp1.2 remotes that look like the 6131n. The can be differentiated by the colors of the oneforall logo or the signature. Then there is another URC 8820 that is some kind of cable remote that has one of the newer interface types jp2 i think but i am not sure._________________Remember to provide feedback to let us know how the problem was solved and share your upgrades.

Tip: When creating an upgrade, always include ALL functions from the oem remote, even if you never plan on assigning them to a button. Complete function lists makes an upgrade more helpful to others.

so here's what I did, I went back to Tommy's doc on the FTDI cable and made a note of which color he was attaching to each pin, then I went to the FTDI spec to see what each color wire is, then I went to the ebay listing to see what color coding they use and I got to the right combination, which turns out is the combination that Revwillie posted, so I don't know why it didn't work before, but it works now.

Ok, here's some advice for anyone that tries to add a regular IDC connector onto the end of one of these cables, when you wire it, use all 6 wires (ie, with red on pin 1 and blue on pin 5) then once you've got it clamped down, then snip the red and blue wires. If you snip them beforehand, it's virtually impossible to leave just the right spacing for the 2 missing wires (at least, it was for me)._________________Rob
www.hifi-remote.comPlease don't PM me with remote questions, post them in the forums so all the experts can help!

Hey mdavej, did your Cable work? I bought the same one, and while downloading from remote with RMIR it appears an error. an dDownloading Raw fails with unable to read the signature... any conclusions?
I'm on a Mac by the way..